The six-foot, seven-inch forward from Melba, spent two seasons in the BSU program for head coach Leon Rice.
"I am excited to continue my basketball career at the College of Idaho," Nebeker said. "I am looking forward to playing in front of my family and all of the local support. "
Nebeker was a redshirt during 2012-13 season in which Boise State qualified for the NCAA National Championships, while this past season, he played in 10 games as a reserve forward.
"We are very excited to welcome Joey Nebeker to the C of I campus and the Yotes basketball family," Garson said. "He will be an incredible addition to our program and the student body as a whole."
Nebeker was a four-year starter at Melba High, leading his team to three-consecutive state tournament appearances under head coach Bob Lenz.
As a sophomore, Nebeker averaged 20 points and six rebounds per game, earning All-Western Idaho Conference honors and 2A all-state accolades. A year later, he was named 2A Player of the Year, averaging 20 points and seven rebounds, leading MHS to the state title.
During the 2011-12 season, Nebeker was named Idaho's Gatorade Player of the Year, averaging 23 points, 10 rebounds, three steals, three assists, and three blocked shots per game.
"We are excited to have one of the best local talents in recent years coming to the College of Idaho," Garson said. "Joey is an outstanding ball player that will make us better and is an even better person. Being able to sign a player the quality of Joey Nebeker speaks volumes to where the Coyote men's basketball program has grown in the past season-plus."
The Coyotes are coming off a 28-6 campaign, including a Cascade Conference regular-season and tournament championship, and were ranked as high as No. 2 in the NAIA Division II national poll.